祁连山林区森林可燃物含水率变化规律研究

Studies on the changing pattern of forest fuel moisture

通过对祁连山林区寺大隆林场的青海云杉、祁连圆柏、高山灌丛林、牧坡草地的鲜枝叶及枯落物含水率不同时间的测定分析,研究了可燃物含水率变化规律。结果表明活体可燃物含水率主要受自身生理机能的影响,青海云杉枝叶的含水率大于祁连圆柏,高山灌丛次之,杂草最低;死体可燃物含水率与空气温度、相对湿度、风速、连旱日数等气象要素的关系密切。利用多元统计方法建立了可燃物含水率与其相关因子的数学模型,回归显著,可用于预测森林可燃物含水率。

According to the measurement and analysis of moistures of Spruce forest (Picea crassifolia), Cypress forest (Sabina przewalskii), shrub and grass fresh and withered branches and leaves in the Qilian Mountains, Sidalong forestry farm, the changing pattern of fuel moisture were discussed in this paper. The results showed that dynamic fuel moistures was mainly determinded by their physiological factors.The moisture of Picea crassifolia branches and leaves was higher than Sabina przewalskii and shrub, the grass’s was lowest.The dead fuel moisture was determinded by meterological factors including air temprature, humidity, wind speed and continuous dry days. The model of fuel moisture and meterological factors developed in multi-factors statistical means in this paper could be applied to predict the fuel moisture in the Qiliang Mountains.